Analysis of a Welded Connection of Elements with Packings
Objective: Check the mode for calculating welded connections.
Task: Check the fillet welded connection between two strips in tension with packings.
References: Moskalev N.S., Pronosin J.A. Steel Structures. Handbook / M.: ASV Publishing House, 2010. p. 87-88.
Compliance with the codes: SNiP II-23-81*, SP 16.13330.2011, SP 16.13330.2017, DBN B.2.6-163:2010, DBN B.2.6-198:2014.
Initial data:
| 300х20 mm | Strip section |
| 250х12 mm | Packing section |
| Run = 360 MPa | Steel С235 |
| N = 1380 kN | Force |
| Rwf = 180 MPa | Manual welding with E42 electrodes |
| kf = 10 mm | Weld leg |
Initial data file:
1.7.sav;
report — Kristall1.7.doc
KRISTALL initial data:
Steel: C235
|
Importance factor |
1 |
|
Service factor |
1 |
|
Group of structures according to the table 50* of SNiP II-23-81* |
4 |
|
Properties of welding materials: |
|
|---|---|
|
Characteristic resistance of the weld metal based on the ultimate strength, Rwun |
410000 kN/m2 |
|
Design resistance of the fillet welds for shear in the weld metal, Rwf |
180000 kN/m2 |
|
Type of welding |
Manual |
|
Position of weld |
Flat |
|
Climatic region |
with temperature t > -40°C |
|
Type: |
Parameters: |
|---|---|
|
|
Weld leg = 10 mm
|
Internal forces and moments:
N = 1380 kN
My = 0 kN
Qz = 0 kN
|
Checked according to SNiP |
Check |
Utilization factor |
|---|---|---|
|
Sec.11.2 Formula (120) |
of the weld metal |
0.944 |
|
Sec.11.2 Formula (121) |
of the metal of the fusion border |
0.734 |
Comparison of solutions:
|
Check |
of the weld metal |
|
Source |
27,4 cm / 28/cm = 0,979 |
|
KRISTALL |
0,944 |
|
Deviation, % |
3,58 |
Comments:
In the example, the plates are cut in the shape of a fish, the theoretical length of the weld along the diagonal is 290 mm, one of the legs has the size of 260 mm, and the other – 290 – 260 = 30 mm. Therefore, the width of the plate is specified in KRISTALL as 2*30 mm = 60 mm to maintain the same length of the welds.